<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>

    var majorityElement = function (nums) {
      nums.sort((a, b) => a - b)
      return nums[Math.floor(nums.length / 2)]
    };
    console.log(majorityElement(nums = [2, 2, 1, 1, 3, 3, 3, 1, 2, 2, 3, 3, 3, 3, 3, 3, 3]))
  </script>
</body>

</html>